William Rioli (known as Junior Rioli since August 2022 and Willie Rioli beforehand) (born 4 June 1995) is a professional Australian rules footballer playing for the Port Adelaide Football Club in the Australian Football League (AFL), having initially been drafted to the West Coast Eagles. He attended Xavier College, Melbourne and was drafted by the West Coast Eagles with their third selection and fifty-second overall in the 2016 national draft. He made his debut in the fifty-one point win against the Western Bulldogs at Etihad Stadium in the round two of the 2018 season. Coming from the Rioli family, he is the first cousin of Dean Rioli (Essendon Football Club), Cyril Rioli (Hawthorn Football Club) and Ronnie Burns (from his mother's side), first cousin once removed of current Richmond Foo